I'm looking for specific and non obvious answers. Give me something visceral, rid the world of a figure or nation you hate. Preserve a culture you adore. It doesn't have to make sense either, you are basically god here.
What I mean is don't just say you'd get rid of imperialism or colonialism bc no shit
Personally I would make it so that the Americas are never discovered by the old world and every would be conquistador (especially cortez and pizarro) explodes.
I think you'd see something like the Mongol Empire emerge in the Great Plains.
See, very interesting possibilities